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Test your basic knowledge |
Dairy Cattle And Reproduction
Start Test
Study First
Subjects
:
industries
,
dairy
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 4-6 days
mare estrus
Grading choice
leydid or interstitial cells
uterus
2. What about the sperm for a bull which has been castrated but still has testicles?
mare ovulation
Mares
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
cow gestation
3. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.
Where livelihood is in agriculture
van deferens
uterus
Bull's fibro-elastic penis
4. 147 days
monestrous
Where livelihood is in agriculture
ewe gestation
sow gestation
5. Male on one pin and female on other side
cow ovulation
libido test (BSE)
mare estrus
dairy cattle pregnancy check
6. Sperm production
mare estrus cycle
Bull's fibro-elastic penis
spermatogenesis
dry-off time in dairy cattle
7. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.
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8. Superior genes are _______ to multiply
cryptorchid
Blood
Hard
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
9. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat
semen evaluation (BSE)
Bull's fibro-elastic penis
functions of progestrone
colostrum
10. 45-60 days after breeding; re-breed as required
Jersey Cow
dairy cattle pregnancy check
sow estrus cycle
mastitis
11. Birthing process (termination of gestation)
scrotal circumference (BSE)
Mares
Parturition
mare gestation
12. What makes the milk flow through the mammary glands?
Bull's fibro-elastic penis
reason for seasonal breeding periods
Blood
Avg. bull specs
13. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.
mare ovulation
Parturition
~1 month
why does the cow need fat deposits during pregnancy?
14. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)
prostate gland
hypothalamus and pituitary gland
van deferens
scrotum
15. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)
reason for seasonal breeding periods
prostate gland
organs used in spermatogenesis
prostaglandin
16. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING
rectal palpation (BSE)
Where livelihood is in agriculture
reasons for castration
reason for seasonal breeding periods
17. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation
things to check for in a breeding soundness exam (BSE)
cow estrus cycle
butterfat
~1 month
18. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off
castration
elastrator
Holstein Cow
vulva
19. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.
sigmoid flexure
seasonally polyestrous
Reasons for gestation length being affected
mastitis
20. Animals which have many estrous periods per year (ex: cow - sow)
polyestrous
Culls bulls earlier (2 reasons)
cow ovulation
dairy cattle pregnancy check
21. Larger the cow - more milk is produced; smaller the cow - less milk is produced
Hard
Size of cow in relation to the amount of milk produced
urethra
mare's estrous cycle
22. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.
estrus
Reasons for gestation length being affected
sow ovulation
Holstein Cow
23. Days which have increasing daylight hours
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24. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has
effects of estrogen
rectal palpation (BSE)
castration
Parturition
25. Not under a timeline - cow can not be sold as steak
sertoli cells
elastrator
Grading choice
purpose of Breeding Soundness Exam (BSE) for males
26. 1-2 days
ewe estrus
feeding a high producing dairy cow
6-8 weeks
humans: stress level vs sperm
27. ~305 days (altough often longer due to breeding difficulties)
Dairy Cattle Lactation (standard)
rectal palpation (BSE)
mare ovulation
accessory sex glands
28. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)
Follical Stimulating in males
age and castration
sow ovulation
estrous
29. (switzerland) 2nd in size and milk production - most muscle -
Culls bulls earlier (2 reasons)
Brown Swiss Cow
ewe's estrous cycle
Dairy Cattle Lactation (standard)
30. 45-60 days after breeding; re-breed as required
dairy cattle pregnancy check
ewe gestation
seasonally polyestrous
humans: stress level vs sperm
31. What makes the milk flow through the mammary glands?
growth lost from castration methods (knife & band)
Blood
scrotal circumference (BSE)
dry matter and water
32. To remove/separate testicles from animal's body before animal reaches puberty
sow gestation
castration
Hormones from both the fetus and the mom.
things to check for in a breeding soundness exam (BSE)
33. What helps regulate spermatogenesis?
ewe gestation
testosterone
cremaster muscle
Blood
34. Microscopic - make sure not sterile - very few bulls are actually tested
semen evaluation (BSE)
spermatogenesis
humans: stress level vs sperm
Lutinizing Hormone in females
35. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)
Size of cow in relation to the amount of milk produced
feeding a high producing dairy cow
effects of BST
dry-off time in dairy cattle
36. Provide nourishment for the developing sperm
cowper's gland
humans: stress level vs sperm
Bull's fibro-elastic penis
sertoli cells
37. 114 days
sow gestation
reasons for castration
things to check for in a breeding soundness exam (BSE)
sperm cell
38. 24 hours before end of estrus cycle
mare ovulation
4 major reasons for culling dairy cows
visual evaluation (BSE)
monorchid
39. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract
eminal vesicles
visual evaluation (BSE)
effects of estrogen
sow ovulation
40. 265-285 days
Parturition
sperm cell
Dairy Cattle Gestation
stag
41. 30-38 hours after estrus cycle begins
seminiferous tubules
sow ovulation
estrous
mare estrus
42. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm
hypothalamus and pituitary gland
scrotal circumference (BSE)
Culls bulls earlier (2 reasons)
dartos muscle
43. Check feet and legs - look for masculine traits in build such as crest and muscling
visual evaluation (BSE)
prostate gland
mare ovulation
Grading choice
44. Animal which has been castrated after puberty
stag
scrotal circumference (BSE)
scrotal circumference (BSE)
sertoli cells
45. (FSH) causes egg to mature in females
scrotum
1. more cost effective - 2. powdered milk is in excess production
ewe ovulation
Follical Stimulating in females
46. To remove/separate testicles from animal's body before animal reaches puberty
castration
dairy cattle pregnancy check
Size of cow in relation to the amount of milk produced
Jersey Cow
47. Why Dairy calves are fed powdered milk.
mare estrus cycle
1. more cost effective - 2. powdered milk is in excess production
~1 month
accessory sex glands
48. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders
Mares
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
penis proper
van deferens
49. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)
polyestrous
what has to happen for males for copulation to occur
4 major reasons for culling dairy cows
testis (gonads)
50. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells
organs used in spermatogenesis
6-8 weeks
Follical Stimulating in females
mare ovulation